Handle for screw drivers or similar tools



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c wAsKQM HANDLEFOR scREw DRIVERS oa SIMILAR Toons Feb. 2s, 1928.

Patented Feb. 28, 1928.

i UNITED STATES.

CLARK WASKAOMI,` OF ROCKFORD, ILLINOIS.

HANDLE ronscnnw DRIVERS on SIMILAR roots.

Application filed December 13, 1922. Seralr'No. 606,559.

This invention relates in general to hand tools, land has moreparticular reference to screw drivers and similar tools characterized bya handle in which is secured a shankor tang of a blade or the like.

The primary object of my invention is to provide a generally improvedtool -of this character,which will be exceptionally dura#v ble andadapted for the most severeservice requirements. l

One of the features is the handle construction which is designed to soixedly secure the shank in the handle as to preclude any possibility lofturning or twisting vthe handle on the shank.

Another feat-ure is the provision of an.

insulated handle characterized by a body portion of non-conductivematerial in which the tang is driven and an outer metallic casing shapedin -a peculiar and advanta-V geous manner to be `brought into wedgingengagement with the handle body for insuring Va most` rigid connectiontherewithv and for reinforcing the connectionbetween the handle body andthetang. In this re! gard, my invention contemplatesv the use of a wedgein a novel manner .and also'the use at a comparatively low cost and willserve 40. in a practical mannerthe purposes intended.

-Other objects yand attendant: advantages will. be appreciatedby thosefamiliar with this art as the invention becomes better un-v derstood byreference 'to the following de,- scription when considered in connectionwith the accompanying drawings, in which Figure 1 is a view of a screwdriver emh bodying my invention.;l

Fig. 2 is an enlarged longitudinal,l .sectional view through the screwdriver;`

Fig. v is a longitudinal sectional view through the handle body beforeassembly;

Fig.. 4 is a `cross sectional view taken on the line 4 4 of Fig. 2;

Fig.V 5 is aperspective'view of the wedge V55` before assembly; f

flig.v 6 is a longitudinal sectional view through a screw driver showinga modified form `of my invention; and

Fig. 7 is a sectional view taken substan- 6@ tially on the Vline-7 ofFig. *'6. While I havein `the present application illustrated myinvention 4 as applied to a screw driver, it should be understood thatit is applicable to any hand tool having a 05 handle inwhicha shank-or.tang of a blade or the likeis secured. .l Referring more particularlyto the draw-y 1ng, it will beobserved that the shank 8 of the blade isshaped to provide the usual screw driver end or point 9, and has a tang.end 11 lluted `or otherwise formed irregular in cross section,preferably to providevradially disposed ribs 12 ,ass plainly shown inFig. 4.

The handle vbodydesignated generally 13 of some non-,conductivemateria-l,V such for exampleas wood, is axially bored .at 14 for thereception .of the shank 8, the bore being reduced in diameter at 15 sothat the tang Y end T11` will have to be forcibly driven into 80 thehandle body. The shank will not, however, be driven into the handlebody, except in conjunction with the driving vo f the handlev casingthereon, which casing will now be described. Y o l A. y 85, The handlecasing designated generallyby' 16, of any ,suitable metal or alloy inthe form of-'a tubular body having a semi-spheri- Y cal end 17 isadapted to be driven over the Y end 18fof the handle body, and at the'same 90 time to'force a wedge of any suitablermaterial 19 into thediametrical slot 21 in said handle body; The Qinterior ofthe handleThe'grooved portions of the tlutingincrease in depth from the annularportion 22 to the shoulders 25 at the closed end of the handle casing,.and the ribs 24 may beequi-distant 100 throughout their length from thecenter of i sphercal shape of its exterior. As shown plainly in Fig. 3,the upper end ot the handle body 13 is shaped to provide shoulders 26Vns and 27 complemental to the portions'22 and on the interior oi thehandle casing.

The handle casing will then be driven downward, thereby forcing thewedge into the slot 21 and spreading or expanding the separatedimpossible to turn the casing on `the body.`

portions ot the handle body and `at the same time driving said bodyvontothe tang, the latter of which forces its way up through the center ofthe wedges` The wedge material, it will `be understood, is susceptibleof compression to an extent to absorb in this what material is displacedby the tang 19. The said parts are so `proportioned that the casing willhave to be driven onto the body with considerable torce and sothat theperiphery or the body portion 18 will be forcibly driven into thegrooves 23 and the ribs 24.t A suitable ferrule 31 is pressed `|onto thelower end of the Abody 13 and a pin` 32is passed through said parts andthe' shank and riveted Ato further secure the shank in the handle.` y 4`As a result of the Jforegoing, the casing and body will beinter-lockedcircumferentially and substantially throughout the length ofthe casing` making it practically Furthermore, the body portion wedgedinto the casing will be under considerable com- .i pression, with theresult-that the tang 11 will be held undergreater pressure and rigiditythanif simplydriven into a restrictedopening in the handle. Anotheradvantage of this construction is that the casing is irremovably lockedonthe handle bodv by reason otexpansion of the latter, and will notloosen, but instead will become more tightly engaged thereon by drivingblows from a hammer. It will also be noted that when blows aredriven onthe -end of the screw drivel', the force will be opposed by the cas- Theoutside diameter ofthe end 18 of said body opposite the mouth end of thecasing, a resil` ient packing l30 is interposed to absorb the blows. Itwill be manifest that the blade is insulated from the handle casing 16,and for this reason the tool is adapted for use in electrical workwithout danger.

` Another teature ot my invention is the eX- tei-nal shape of the handlecasing. As

shown inFig.r 1, this casing is tinted and the intermediate portions 2Oare hnurled to improve the grip. The semi-spherical end 17, however, isfinished `smooth and its diameter ,along its base is greater than`thatof the` knurled portion of the casing, with theresult that Vthebase portion of said end overreaches the knurled portion of the casing.l

This smooth over-reaching end is well adapted to iit the palm of thehand andprotects the latteri'rom the roughened surface of the knurledportion. This does not, however,

interfere with the grip of the finger onthe knurled tinted portion..Consequently a` tight grip may be had and'considerable pressure appliedwithout injury to the hand,`

.In Fig. 6, I havefshown a modified io'rm` of my invention, which issimilar to the Aforegoing as noted by similarity of reterence numerals,with the exception ot the blade and` the manner `in which itis securedin the handle. It will beobservedfthat the tang 33 is somewhat `fullerin cross section and eX- tendsito the top of thebody 1,8, terminating`ina reduced end 34. A steel driving cap 35 provided with calks 36 on itsunderside iitted onto the head 17 ofthe handle casing and has anopeningthrough which said endV 341: of the tang passes,rthis end being thenriveted to rigidly secure the cap, `handle casing and tang together.This construction while not giving an insulated handle is,how

ever, better adapted for screw drivers lof;

larger sizes and will withstand heavy driving blows to better advantage.In fact, a tool of this type may be used as a chiselfor cutting offrivets ofthe same diameter as the shank without injury to the tool. Itisalso preferredto equip this style of tool with an angularwrenclrgripping part 37 suitably fixed to the blade.

It is believed that the foregoing conveys a clear understanding of theobjects prefaced above, and it should be understood that while thepresent description is merely for purpose of illustration, considerablechange might be made in details of construction without de- `Y partingfrom the spirit and scope of the invention as expressed in the appendedclaim,

in whichy I claim: Y

A hand tool comprising a handle body of wood slotted longitudinally atone end,A for the reception of al wedge and bored at the op`` 1,660,537v BA posit@ end foi` the reception of a tang, a mebe-driven into thelatter by blows on the end tallie handle casing adapted to telescopeoveivof the easing which also serve to drive the the slotted end of the bodyand being ntecasing onto'the body and spread the split 10 rorlylongitudinally fluted, ablade having a portion of the body laterallyinto the luted 5 tang adapted to enter said bore and to be Wall of thecasing. 1

forced Vinto the body7 'and a Wedge adapted y to enter the Slotted endof the body and to CLARK WASKOM.

